2-(Tributylstannyl)pyrazine → (11beta,16alpha,17beta)-17-Cyclopropylcarbonyl-16-methyl-11-[4-(pyrazin-2-yl)phenyl]estra-4,9-dien-3-one

HRID 638819Notes

Reaction equation

HRID 638819 reaction equation
Br[C:2]1[CH:7]=[CH:6][C:5]([C@H:8]2[CH2:25][C@@:23]3([CH3:24])[C@@H:19]([CH2:20][C@@H:21]([CH3:31])[C@@H:22]3[C:26]([CH:28]3[CH2:30][CH2:29]3)=[O:27])[C@H:18]3[C:9]2=[C:10]2[C:15]([CH2:16][CH2:17]3)=[CH:14][C:13](=[O:32])[CH2:12][CH2:11]2)=[CH:4][CH:3]=1.C([Sn](CCCC)(CCCC)[C:38]1[CH:43]=[N:42][CH:41]=[CH:40][N:39]=1)CCC>>[CH:28]1([C:26]([C@H:22]2[C@H:21]([CH3:31])[CH2:20][C@H:19]3[C@H:18]4[C:9]([C@@H:8]([C:5]5[CH:6]=[CH:7][C:2]([C:38]6[CH:43]=[N:42][CH:41]=[CH:40][N:39]=6)=[CH:3][CH:4]=5)[CH2:25][C@:23]23[CH3:24])=[C:10]2[C:15](=[CH:14][C:13](=[O:32])[CH2:12][CH2:11]2)[CH2:16][CH2:17]4)=[O:27])[CH2:29][CH2:30]1

Participants

3

Reactant 2

HCID 27373162-(Tributylstannyl)pyrazineHCID 68576237(11beta,16alpha,17beta)-11-(4-Bromophenyl)-17-cyclopropylcarbonyl-16-methylestra-4,9-dien-3-one

Product 1

HCID 44451277(11beta,16alpha,17beta)-17-Cyclopropylcarbonyl-16-methyl-11-[4-(pyrazin-2-yl)phenyl]estra-4,9-dien-3-oneYield 35%

Conditions

Temperature
135 °C

Procedure

According to the procedure described in example 8, (11β,16α,17β)-11-(4-bromophenyl)-17-cyclopropylcarbonyl-16-methylestra-4,9-dien-3-one and 2-tributylstannylpyrazine were heated in a microwave at 135° C. (150 W, 25 minutes) to give the title compound (35% yield). 1H NMR (400 MHz, CDCl3): δ 0.33 (s, 3H), 0.84-2.86 (m, 24H), 4.47 (d, J=7 Hz, 1H), 5.81 (s, 1H), 7.30-7.34 (m, 2H), 7.92-7.96 (m, 2H), 8.49 (d, J=3 Hz, 1H), 8.61 (dd, J=3 and 1 Hz, 1H), 9.01 (d, J=1 Hz, 1H).

Sources & evidence

ORD record
ord-4345295a0651405faad47041700a993e
Source dataset
uspto-grants-2010_04
Patent number
US07691836B2

Reaction notes

Loading…